I have 7 chickens currently in my flock and I am about to add more so I would like to figure this out before I do! I have a shelf in the coop with 3 boxes in it for egg laying. For some strange reason, ALL 7 of my chickens use the same one box for egg laying. It's becoming an issue because they are laying on the ground now when the box is not free. I have even seen 2 chickens sitting in one box at the same time. Why is it they refuse to lay in the other 2 boxes? Any advice on how to correct this behavior?